EP0261918A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of recording indicia for indicating presence or absence of error in medium after error checking and apparatus therefor
Assignee: Canon Inc
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Filing: 1987-09-21
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Granted: —
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Expires: 2007-09-21
Abstract
Abstract There is disclosed an information record method comprising the steps of recording information in one record area of an information record medium having a plurality of record areas, reproducing the recorded information and checking error thereof, and recording an indicia indicating presence or absence of error at a portion of the record area in accordance with an error check result. An information record apparatus used for the above method comprises a device for recording information on an information record medium having a plurality of record areas, a device for moving the record device to a record area to which information is to be recorded, a device for reproducing the information recorded in the record area, a device for checking error based on the reproduced information, and a device for recording an indicia for indicating presence or absence of error at a portion of the record area in accordance with error check result.
Inventors
- 👤 Wataru Sakagami
- 👤 Katsumi Iijima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:51
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1883; G11B7/00; G11B7/002; G11B7/0033; G11B7/004
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
61 words
A method for recording information comprising the steps of: recording information in one record area of an information record medium having a plurality of record areas; reproducing the recorded information and error-checking the reproduced information; and recording an indicia indicating presence or absence of error at a portion of said record area in accordance with the result of the error check.
Claim 2
Independent Claim
61 words
A method for recording information comprising the steps of: recording information in one record area of an information record medium having a plurality of record areas; reproducing the recorded information and error-checking the reproduced information; and recording an indicia indicating presence or absence of error at a portion of said record area in accordance with the result of the error check.
Claim 3
Dependent Claim
45 words
A method for recording information according to Claim 1 further comprising the step of detecting presence or absence of said indicia in said record area prior to recording of the information and changing the record area to a different one when said indicia is detected.
Claim 4
Dependent Claim
43 words
A method for recording information according to Claim 2 wherein said plurality of record areas include a plurality of tracks parallelly arranged on the medium, and the record track is changed to one which is two tracks ahead when said indicia is detected.
Claim 5
Dependent Claim
22 words
A method for recording information according to Claim 1 wherein said indicia indicates that there is an error in said record area.
Claim 6
Dependent Claim
22 words
A method for recording information according to Claim 1 wherein said indicia indicates that there is no error in said record area.
Claim 7
Dependent Claim
18 words
A method for recording information according to Claim 1 wherein said indicia is in a form of line.
Claim 8
Dependent Claim
17 words
A method for recording information according to Claim 1 wherein said indicia is a series of dots.
Claim 9
Dependent Claim
18 words
A method for recording information according to Claim 1 wherein said medium is a card-like optical record medium.
Claim 10
Dependent Claim
85 words
An information recording apparatus comprising: record means for recording information on an information record medium having a plurality of record areas; drive means for driving said record means to one of the record areas; reproduce means for reproducing the information recorded in said record area; error check means for checking an error of the reproduced information; and indicia record means for recording an indicia indicating presence or absence of error at a portion of said record area in accordance with the result of error check.
Claim 11
Dependent Claim
85 words
An information recording apparatus comprising: record means for recording information on an information record medium having a plurality of record areas; drive means for driving said record means to one of the record areas; reproduce means for reproducing the information recorded in said record area; error check means for checking an error of the reproduced information; and indicia record means for recording an indicia indicating presence or absence of error at a portion of said record area in accordance with the result of error check.
Claim 12
Dependent Claim
57 words
An information recording apparatus according to Claim 9 further comprising detection means for detecting presence or absence of said indicia in said record area prior to recording of the information, and control means for activating said drive means in accordance with the output of said indicia detection means to drive said record means to other record area.
Claim 13
Dependent Claim
44 words
An information recording apparatus according to Claim 9 wherein said medium is an optical record medium, and said record means is an optical head including a light source and an optical system for focusing a light emitted from said light source onto said medium.
Claim 14
Dependent Claim
17 words
An information recording apparatus according to Claim 11 wherein said drive means is a head drive motor.
Claim 15
Dependent Claim
23 words
An information recording apparatus according to Claim 11 wherein said reproduce means is a photo-detector for serving a light reflected by said medium.
Claim 16
Dependent Claim
24 words
An information recording apparatus according to Claim 11 wherein said medium is card-like and said record areas are tracks parallelly arranged on the medium.
Claim 17
Dependent Claim
45 words
An information record comprising a record medium, information recorded in one or more information tracks on the medium, and an indicium or indicia on the medium, associated with the or each track containing an information error and indicative of the presence of the error therein.
Claim 18
Dependent Claim
45 words
An information record comprising a record medium, information recorded in one or more information tracks on the medium, and an indicium or indicia on the medium, associated with the or each track containing an information error and indicative of the presence of the error therein.
Claim 19
Dependent Claim
45 words
An information record comprising a record medium, information recorded in one or more information tracks on the medium, and an indicium or indicia, on the medium, associated with the or each track which is error free and indicative of the absence of an error therein.
Claim 20
Dependent Claim
45 words
An information record comprising a record medium, information recorded in one or more information tracks on the medium, and an indicium or indicia, on the medium, associated with the or each track which is error free and indicative of the absence of an error therein.
Claim 21
Dependent Claim
50 words
Apparatus for recording information on a recording medium in which a recording/reproducing device and the medium move one relative to the other in a first direction to record information and move in a second direction opposite to the first to reproduce the recorded information and to check it for eerrors.
Claim 22
Dependent Claim
50 words
Apparatus for recording information on a recording medium in which a recording/reproducing device and the medium move one relative to the other in a first direction to record information and move in a second direction opposite to the first to reproduce the recorded information and to check it for eerrors.
References Cited (Backward Citations)
No citation records indexed.
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